package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.IncorrectUpdateSemanticsDataAccessException;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {

    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品with口味
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        //向菜品表插入数据
        dishMapper.insert(dish);

        //获取主键值
        Long dishId = dish.getId();

        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
               dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否可以删除--是否启售中
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                //当前菜品启售中
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //是否被套餐关联
        List<Long> setmealIdsbyDishIds = setmealDishMapper.getSetmealIdsbyDishIds(ids);
        if (setmealIdsbyDishIds.size() > 0 && setmealIdsbyDishIds != null) {
            //是套餐关联
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        //删除菜品
        for (Long id: ids){
            dishMapper.DeleteById(id);
            //删除口味
            dishFlavorMapper.DeleteByDishId(id);
        }

    }

    /**
     * 根据Id查菜品带着口味
     * @param id
     * @return
     */
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询dish
        Dish dish = dishMapper.getById(id);
        //根据id查询flavor
        List<DishFlavor> dishFlavors = dishFlavorMapper.getById(id);
        //封装成dishvo

        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    /**
     * 更新菜品
     * @param dishDTO
     */
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
        dishMapper.update(dish);

        //删除原有的口味
        Long dishId = dish.getId();
        dishFlavorMapper.DeleteByDishId(dishId);

        //向口味表插入n条数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    /**
     * 根据类型找菜品
     * @param categoryId
     * @return
     */
    public List<Dish> getByCategory(Long categoryId) {
        List<Dish> dishList= dishMapper.getByCategory(categoryId);
        return dishList;
    }

    /**
     * 起售停售菜品
     * @param status
     * @param ids
     */
    public void startorstop(Integer status, Long ids) {
        List<Long> list = new  ArrayList<>();
        list.add(ids);
        List<Long> setmealIdsbyDishIds = setmealDishMapper.getSetmealIdsbyDishIds(list);
        if(setmealIdsbyDishIds.size()>0 && setmealIdsbyDishIds != null){
            throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
        }
        Dish dish=Dish.builder()
                .id(ids)
                .status(status)
                .build();
        dishMapper.update(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getById(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
